Greetings
I am sure many more knowledgeable than I will chip in here, but I know that in 1/72nd *pegasus models do both the Albatros W4 *and the hansa W29 as i have built both
Not sure if all the following are still available but are on my list, which is not very comprehensive
Eastern Express (Toko) do a W29 in 1/72nd and Flashback do one in 1/48th.
Valhalla does a W12 in 1/72nd.
Albatros W4 *also by Merlin and Roden, Roden to 2 versions all in 1/72nd.
The gotha WD12 I couldnt find, but I found a gotha W2 in 1/144 by Sram
The dornier Do X I found in Revell at 1/144
Hope some of this helps.
Graham Evans